Audio Delay Circuit

Aim Design and Supply a schematic diagram of an 'Audio Delay' circuit. Criteria The design should use components that are available at Digikey. The cost of parts should not be more than $25USD. The power supply voltage should not exceed 12volts DC, 5V supply is prefered. The prefered delay of audio is 1 second. The circuit should function. The audio input is from an electric microphone. The audio output should drive an 8ohm 5w speaker. Deliverables A schematic diagram suppied in PDF format. A Bill of Materials suppied in a PDF format. The BOM list must include Digikey Part Numbers